When the bodies of two serial killers are found on Five-0 property with chess pieces in their mouths, McGarrett and the team hunt for a vigilante as fear grows that tourists aren't safe in Hawaii.

23 September 2016

Episode 2

No ke ali'i wahine a me ka 'aina

Five-0 must work with rogue MI-6 agent Harry Langford to find a terrorist planning to cause nuclear reactors across Europe to meltdown. Also, McGarrett and Danny ask retired FBI profiler Alicia Brown to help them find their serial killer vigilante.

30 September 2016

Episode 3

He Moho Hou

When FBI Profiler Alicia Brown finds a body in her bed, she is forced to join McGarrett in the hunt for the chess-piece killer. Also, Kono reconnects with a former surfing competitor, who is now a disabled and homeless war vet

07 October 2016

Episode 4

Hu a'e ke ahi lanakila a Kamaile

Five-0 must find McGarrett and Alicia when they are kidnapped by the serial killer they've been hunting.

14 October 2016

Episode 5

Ke Ku 'Ana

When a cache of guns is stolen from a gun range, Five-0 discovers the culprit is intent on making a dramatic and potentially deadly statement on gun violence. Also, Kono and Adam are finally reunited when he is released from prison.

21 October 2016

Episode 6

Ka hale ho 'okauweli

On Halloween, Five-0 investigates the murder of a medium with a checkered past who was apparently scared to death by a poltergeist. Also, Kono and Adam are kidnapped by what appears to be a death cult.

28 October 2016

Episode 7

Ka makuahine a me ke keikikane

Five-0 must free McGarrett's mother, Doris (Christine Lahti), when Catherine (Michelle Borth) informs them that she was captured and is about to be executed after attempting to free Wo Fat's imprisoned father. Also, Chin loses his appeal to have Sara's adoption delayed, and she must move to Mexico.

04 November 2016

Episode 8

Hana Komo Pae

While Danny chaperones Grace's winter formal, terrorists seize the venue and hold everyone hostage in order to kidnap a diplomat's son.

11 November 2016

Episode 9

Elua la ma Nowemapa

A conspiracy theorist with compelling information that JFK's own cabinet planned his assassination is murdered. Jerry tells the story of the Honolulu Conference on November 20. 1963.

18 November 2016

Episode 10

Ka Luhi

Five-0 investigates the 10-year-old cold case of a missing teen when a boy suffering from PTSD undergoes hypnosis and realizes he may have witnessed her murder. Also, Danny's sister, Bridget (guest star Missy Peregrym), visits Oahu for a business conference, and he suspects that she may be getting too close to a co-worker.

09 December 2016

Episode 11

Ka'ili aku

Five-0 heads to Mexico where Chin risks his life to rescue his kidnapped niece.

16 December 2016

Episode 12

Ka 'Aelike

After Chin is kidnapped by a cartel in Mexico, Five-0 must find and rescue him before he is executed by the group that's out for revenge. Also, Grover goes undercover as a car salesman to investigate a murder that turns out to be far more complex and dangerous than expected.

06 January 2017

Episode 13

Ua ho'i ka 'opua i Awalua

As Max prepares to say goodbye to his Five-0 ohana, they must investigate a murder during a police convention on the Island.

13 January 2017

Episode 15

Ka pa'ani nui

Five-0 uncovers the possibility that a Nazi war criminal may be hiding in an old leprosy colony.

03 February 2017

Episode 16

Poniu I Ke Aloha

McGarrett and Danny spend Valentine's Day with their girlfriends, while the rest of Five-0 investigates the murder of a man who had been taking classes on picking up women.

10 February 2017

Episode 17

Hahai I Na Pilikua Nui

McGarrett and Five-0 once again become entangled in the twisted mind games of serial killer Dr. Madison Gray when she stumbles into HPD covered in blood that matches Alicia Brown's, and claims amnesia.

17 February 2017

Episode 18

E malama pono

MacGarrett and Danny finally track down the missing uranium, which has been used to build a bomb located in the middle of the jungle. Now, they must carefully extract the unstable explosive through treacherous terrain before it detonates.

24 February 2017

Episode 19

Puka 'ana

McGarrett and Kono suspect that an abused young girl may be the victim of a sex trafficking ring on the Island. Also, Chin and Grover investigate a murder at a sober living facility.

10 March 2017

Episode 20

Huikau na makau a na lawai'a

Five-0 helps PI Harry Brown work the case of a kidnapped wealthy woman whose husband may have something to hide. Also, Rachel tells Danny that she is getting a divorce from Stan.

31 March 2017

Episode 21

Ua Malo'o Ka Wai

McGarrett and Five-0 are captured and face certain death after tracking a dangerous nemesis to the Island of Lanai. Also, Grover takes his son to Chicago where he testifies against a dirty cop from his past.

07 April 2017

Episode 22

Waimaka 'ele'ele

Waimaka 'ele'ele

14 April 2017

Episode 23

Wehe 'ana

Danny protects a coma patient showing signs of waking who was the key witness from his last HPD case before he met Steve and joined Five-0. Lori Petty guest stars as Nurse Jenny Kitson, and Michael Paul Chan guest stars as Danny's former HPD Captain, Tanaka.

The lives of Five-0's informants are in danger when the HPD system is hacked and one ends up dead, forcing McGarrett to enlist the help of hacker Aaron Wright (Joey Lawrence), who he just imprisoned. Joey Lawrence Returns as Aaron Wright.

20 October 2017

Episode 5

Kama' oma' o ka 'aina huli hana

Five-0 investigates a series of crimes based on legendary island folklore.

03 November 2017

Episode 6

Mohala I Ka Wai Ka Maka O Ka Pua

Mohala I Ka Wai Ka Maka O Ka Pua

10 November 2017

Episode 7

Kau Ka 'Onohi Ali'i I Luna

Kau Ka 'Onohi Ali'i I Luna

17 November 2017

Episode 8

He Kaha Lu'u Ke Ala, Mai Ho'okolo Aku

McGarrett poses as a pilot to investigate the cause of a plane crash that led to the death of a pilot in an air race.

01 December 2017

Episode 9

Make Me Kai

When investigating a deserted yacht adrift at sea, McGarrett, Danny, Tani and Junior are exposed to a deadly bioweapon and the rest of Five-0 have only eight hours to find an antidote.

08 December 2017

Episode 10

I Ka Wa Ma Mua, I Ka Wa Ma Hope

When Danny is shot while quarantined in the hospital with McGarrett, Tani and Junior, he's left unconscious and clinging to life, imagining a future for everyone in Five-0.

15 December 2017

Episode 11

Oni Kalalea Ke Ku A Ka La'au Loa

Danny, still recovering from his gun shot wound is telling his son Charlie a bed time story who Steve and a group of veterans are hunting down some fake Santas who robbed a money truck.

15 December 2017

Episode 12

Ka hopu nui 'ana

McGarrett rounds up every gang-related criminal on the island to find the culprit behind the killing of an FBI agent who was cracking down on organized crime.

05 January 2018

Episode 14

Na Keiki a Kalaihaohia

When a corpse is stolen from the cemetery, the team races to find out who the man was and why he was taken; Adam recruits someone to become an informant; Tani receives devastating news.

19 January 2018

Episode 15

He Puko'a Kani 'Aima

He Puko'a Kanu 'Aina- McGarret and Danny investigate the murder of a private detective whose client was killed the same way.

02 February 2018

Episode 16

O na hoku o ka lani wale no kai 'ike i kahi o Pae

Five 0 investigate the murder of the headmaster of a private school sending Tani and Junior undercover as prospective parents. Meanwhile Adam is forced to produce a huge amount of hidden money to save his life.

02 March 2018

Episode 17

Holapu ke ahi, koe iho ka lehu

Adam's mission to take down organized crime goes sideways when the bait he used falls into the wrong hands; Adam begins to doubt Jessie's allegiance.

09 March 2018

Episode 18

E Ho'oko Kuleana

A flashback about the case that changed Danny's life and an answer about who shot him by meeting a woman who was married to the shooter. Jimmy Buffett returns, Alex O'Loughlin directs his first episode and plays the guitar.

30 March 2018

Episode 19

Aohe Mea Make I Ka Hewa; Make No I Ka Mihi Ole

A hitman, Leroy Davis (Frankie Faison), McGarrett's father failed to arrest comes to McGarrett to finally confess his crimes and admit where he buried his victims. Also, Jessie makes a dangerous decision that could ruin Adam's life.

06 April 2018

Episode 20

He Lokomaika'i Ka Manu O Kaiona

Catherine returns to Hawaii to ask Five 0 some help in order to follow up a lead for one of her CIA cases.

13 April 2018

Episode 21

Ahuwale Ka Nane Huna

Harry Langford enlists McGarrett and Danny's help to track down a teenage British royal who has run away while under his protection; Grover, Tani and Junior work a 25-year-old murder case.

20 April 2018

Episode 22

Kopi Wale No I Ka I'a A 'Eu No Ka Ilo

Duke is forced to steal crucial evidence from the police locker in exchange for his kidnapped granddaughter; Jerry goes undercover at a mental health facility to solve a murder. (#190)

27 April 2018

Episode 23

Ka Hana A Ka Makua, O Ka Hana No Ia A Keiki

Steve and Five-O take on the mob when a former boss is killed; Junior's friend is on the run after witnessing the murder. (#191)

04 May 2018

Episode 24

Ka Lala Kaukonakona Haki 'Ole I Ka Pa A Ka Makani Kona

Steve joins Junior and his SEAL team on a mission to capture an elusive person who is holding his mentor hostage; Gerard and Kamekona help Lou and Tani on a murder case involving art stolen by Nazis in World War 2. (#192)

11 May 2018

Episode 25

Waiho Wale Kahiko

The team discovers a Russian spy ring hiding on Oahu, Hawaii U.S.A. when one of their submarines appears off the coast. (#193)

18 May 2018

Episode 1

Ka owili oka'i

After Steve's CIA agent friend is killed, McGarrett lets himself be captured by the group he thinks is responsible and endures a torturous sensory deprivation tank to find the killer.

28 September 2018

Episode 2

Ke Kanaka I Ha'ule Mai Ka Lewa Mai

Ke Kanaka I Ha'ule Mai Ka Lewa Mai

05 October 2018

Episode 3

Mimiki Ke Kai, Ahuwale Ka Papa Leho

Mimiki Ke Kai, Ahuwale Ka Papa Leho

12 October 2018

Episode 4

A'ohe kio pohaku nalo i ke alo pali

A'ohe kio pohaku nalo i ke alo pali

19 October 2018

Episode 5

A 'ohe mea 'imi a ka maka

Young Jerry witnessed a murder while at camp in 1982. He's telling this story to his friends while going back to the camp in the present day. He wants to search for the body before developers level the property. A woman watching a news story about a murder realizes that her daughter drew a picture of the crime scene three days earlier. Jerry's most likely site for the body is on the property line of Bo Bradley, who Jerry thinks is the Ax Man. McGarrett and Junior interview the girl. Katie. She s

26 October 2018

Episode 6

Aia i Hi'ikua; i Hi'ialo

McGarrett crosses the line and is arrested while investigating the death of his former SEAL buddy, who died on an aircraft carrier, and the only survivor is a baby. Also, Adam returns to Oahu with some devastating news about his marriage.

02 November 2018

Episode 7

Pua a'e la ka uwahi o ka moe

A cold case of Chang Apana (a real life detective in 1930s Honolulu) lands in Steve's lap. This leads to the crew working on the case in a 1940's world.

09 November 2018

Episode 8

Lele pu na manu like

Lele pu na manu like

16 November 2018

Episode 9

Mai ka po mai ka 'oia'i'o

Mai ka po mai ka 'oia'i'o

30 November 2018

Episode 10

Pio ke kukui, po'ele ka hale

A mission from Steve's past brings what is left of his SEAL team together to protect themselves from the group that wants them dead while Five Oh looks for the man who took on McGarrett by himself.

07 December 2018

Episode 11

Hala I Ke Ala O'i'ole Mai

Hala I Ke Ala O'i'ole Mai

04 January 2019

Episode 12

Ka hauli o ka mea hewa 'ole, he nalowale koke

McGarrett and the team support Danny & Rachel by determining what happened when Grace gets into a life-threating car accident; Tani helps Koa when his rehab patient goes missing.

11 January 2019

Episode 13

Ke iho mai nei ko luna

Adam, Junior, and Tani travel to the bottom of the Pacific Ocean when a murder takes place in a remote underwater lab and the killer may still be on board.

18 January 2019

Episode 14

Ikiiki i ka la o Keawalua

While investigating Flippa's friend's murder, McGarrett and Grover uncover a deadly plan by an extremist group on the island. Also, Grover has an emotional reaction to the case.

01 February 2019

Episode 15

Ho'opio 'ia e ka noho ali'i a ka ua

Ho'opio 'ia e ka noho ali'i a ka ua

15 February 2019

Episode 16

Hapai ke kuko, hanau ka hewa

A woman dies suspiciously while swimming as part of a mermaid troupe, and Adam throws more than a helping hand to a down on his luck drunkard vagrant.

22 February 2019

Episode 17

E'ao lu'au a kualima

Five-O has to chase down a group of murderous bank robbers after they just shot their way out of the bank.

22 February 2019

Episode 18

Ai no i ka 'ape he mane'o no ko ka nuku.

Tani and Junior go under cover at a gym to track down a deadly batch of steroids; Danny and MacGarrett work as bodyguards for Danny's high maintenance ex-mother-in-law, a famous romance novelist with whom he has never gotten along.

08 March 2019

Episode 19

Pupuhi Ka He'e O Kai Uli

Pupuhi Ka He'e O Kai Uli

15 March 2019

Episode 20

Ke ala o ka pu

Five-0 must locate a teen girl who purchased a gun from a junkie, and discover that the firearm, over the course of decades, has affected all of their lives.

05 April 2019

Episode 21

He Kama Na Ka Pueo

He Kama Na Ka Pueo

12 April 2019

Episode 22

O ke kumu, o ka mana, ho'opuka 'ia

While Adam investigates the murder of an undercover FBI agent about to wed the daughter of a Yakuza leader, Noelani is held hostage and forced, along with her mentor Dr. Chu (Page Leong), to operate at gunpoint on a criminal.

26 April 2019

Episode 23

Ho'okahi no la o ka malihini

McGarrett helps his sister spy on shady neighbors; a ride-share driver and his passenger are murdered; the team teases the youngest members when Junior escorts Tani to a wedding.

03 May 2019

Episode 24

Hewa ka lima

Fugitive hacker Aaron Wright (Joey Lawrence) resurfaces to ask Five-0 for help when his co-workers at the NSA, which he has been working for, are all murdered. Also, Junior speaks at the parole hearing of the drunk driver who killed his sister.

10 May 2019

Episode 25

Hana Mao 'ole ka ua o Waianae

Five-0 continues to hunt down escape criminal Aaron Wright before he can sell cyber-weapons to the highest bidder; the lives of McGarrett and the team members are put in danger when a visitor comes to headquarters to make amends.